diff --git a/plugins/lazyYT/assets/javascripts/initializers/lazyYT.js.es6 b/plugins/lazyYT/assets/javascripts/initializers/lazyYT.js.es6
index b05cf205393..21037618f79 100644
--- a/plugins/lazyYT/assets/javascripts/initializers/lazyYT.js.es6
+++ b/plugins/lazyYT/assets/javascripts/initializers/lazyYT.js.es6
@@ -11,14 +11,6 @@ export default {
         const iframes = $('.lazyYT', $elem);
         if (iframes.length === 0) { return; }
 
-        // We use this because watching videos fullscreen in Chrome was super buggy
-        // otherwise. Thanks to arrendek from q23 for the technique.
-        $elem.iframeTracker({ blurCallback: () => {
-          $(document).on("scroll.discourse-youtube", returnFalse);
-          window.setTimeout(() => $(document).off('scroll.discourse-youtube', returnFalse), 1500);
-          $(document).scroll();
-        }});
-
         $('.lazyYT', $elem).lazyYT({
           onPlay(e, $el) {
             // don't cloak posts that have playing videos in them
@@ -26,6 +18,14 @@ export default {
             if (postId) {
               api.preventCloak(postId);
             }
+
+            // We use this because watching videos fullscreen in Chrome was super buggy
+            // otherwise. Thanks to arrendek from q23 for the technique.
+            $('iframe', iframes).iframeTracker({ blurCallback: () => {
+              $(document).on("scroll.discourse-youtube", returnFalse);
+              window.setTimeout(() => $(document).off('scroll.discourse-youtube', returnFalse), 1500);
+              $(document).scroll();
+            }});
           }
         });